I agree Harddon

I have tried

PlugIns... Plug it in, plug it in.
AirWicks scented oil
California scents in a can

Leaving a window open

The only thing that works so far is Febrez but only for a short time. I guess if I had a few hundred to spend some sort of Ionic machine would work but not to sure.

If anyone finds a cheap easy way to cover the smell, I think you could make millions

I actually like the smell of marijuana plants but.....